@inproceedings{20ffcbad0ccc4da79110ab87291ba173,
title = "Robust Readout Circuit with Leakage Current Cancellation Technique for Stretchable Touch Sensors",
abstract = "Stretchable touch sensors are being required for next generation wearable devices. Here, we propose a robust readout circuit with a leakage current cancellation technique (LCCT) to deal with issues unique to the stretchable touch sensors. The LCCT cancels the effect of leakage current which increases when a finger approaches. The circuit's ability to measure both self capacitance (SC) and mutual capacitance (MC) changes enables reliable touch detection. A capacitance variation is compensated by intentionally adding offset voltage. Experimental results showed a performance of the circuit with a signal to noise ratio (SNR) of 27.1 dB when measuring SC and 35.3 dB when measuring MC of a prototype stretchable touch sensor. The effectiveness of the LCCT was demonstrated using an equivalent circuit of the sensor. ",
keywords = "capacitive touch sensor, leakage current, mutual capacitance, readout circuit, self capacitance, stretchable device, wearable device",
author = "Kaoru Yamashita and Tokihiko Shimura and Shun Sato and Naoji Matsuhisa and Hiroki Ishikuro",
note = "Funding Information: This work was supported by JST, PRESTO Grant Number JPMJPR20B7, Japan. Part of this work is supported by The Amada Foundation, and Shorai Foundation for Science and Technology. Publisher Copyright: {\textcopyright} 2021 IEEE.; 28th IEEE International Conference on Electronics, Circuits, and Systems, ICECS 2021 ; Conference date: 28-11-2021 Through 01-12-2021",
year = "2021",
doi = "10.1109/ICECS53924.2021.9665501",
language = "English",
series = "2021 28th IEEE International Conference on Electronics, Circuits, and Systems, ICECS 2021 - Proceedings",
publisher = "Institute of Electrical and Electronics Engineers Inc.",
booktitle = "2021 28th IEEE International Conference on Electronics, Circuits, and Systems, ICECS 2021 - Proceedings",
}